h2o2 causing vaginal odor

 Hi, i´ve been using 35% h2o2 on two occassions, but both times I had to stop it because of a terrible vaginal odor, specially during my period....so strong I´ts just disgusting. I thought it must be the oxidation inside the vagina due to the extra oxigen.... but then it should be something common to many women, but I haven´t found anything on the internet....no one else stating this..... Plese if you know why it is caused or what it means.... would be so great to hear.... I{m kind of worried it might be an indication of illness